Works with or without existing solar panels

Battery Storage Installation in the Chilterns

A home battery stores cheap overnight electricity or surplus solar power for use when you need it most. Chiltern Energy Group installs NAPIT-certified battery systems across the Chilterns from £3,495. We size the right battery for your home at a real in-person site survey, not just sell you the biggest one.

Store surplus solar energy for evening use. Stop exporting cheap, buying expensive.

Reduce grid dependence: generate and use more of your own electricity

Backup power during outages (with compatible systems)

Works with existing solar panels: retrofit available

In-person survey to assess the right battery size for your home

6-month post-install support

Get a Free Quote 01494 977298

How much does battery storage installation cost?

5–7kWh battery (typical home)

from £3,495

installed, includes commissioning and app setup

10–15kWh battery (larger home / EV)

from £4,500

full day coverage for most 4-bed households

Final price confirmed at your free site survey. Includes battery system, hybrid inverter (if needed), installation, and commissioning.

NAPIT RegisteredOur engineers are NAPIT-registered. Every installation is Part P compliant.

In-person site surveyWe come to you. No self-survey forms, no surprises on the day.

6-month supportSomething not right? We are local. We come back within days.

Fixed price quotesPrice agreed before work starts. What we quote is what you pay.

Local Chilterns teamBased in Beaconsfield. We know the area. We are your neighbours.

How do people use home battery storage?

Most Chilterns homes can pay back a battery in 4–6 years. Here is how.

Store cheap overnight electricity

Charge your battery on cheap overnight tariffs (Octopus Go, Intelligent Octopus etc.) and use it during peak hours. Typical savings: £300–600 per year.

Store surplus solar power

If you already have solar, a battery means energy generated at noon is available at 7pm when demand is highest. Stop selling cheap, start using free.

Power during outages

Most home batteries provide backup functionality. When the grid goes down, your battery keeps essential circuits running.

Reduce your grid dependency

Combined with solar, a battery system can cover 70–90% of a typical Chilterns household energy demand across summer months.

How does battery storage installation work?

From your first call to a battery ready to charge overnight.

Usage assessment

We review your solar generation data and electricity usage to recommend the right battery size. Bigger is not always better: we size it to your actual needs.

System compatibility check

We check your existing inverter and solar system for compatibility. Most modern systems work with retrofit batteries, but we confirm before quoting.

Installation

Most battery installations take half a day to a full day. We mount the battery in a suitable location (garage, utility room, or airing cupboard), connect to the inverter, and configure the system.

Monitoring setup

We set up the monitoring app so you can see how much your battery is storing, discharging, and saving you in real time.

Battery and solar: the full system

Can you add a battery to existing solar panels?

If you already have solar panels, a battery is the most effective upgrade you can make. Without storage, surplus power generated during the day is sold back to the grid at 4–5p per unit. A battery lets you use that power yourself at 28–30p equivalent savings instead.

Compatible with most solar inverters (check at survey)

Retains Smart Export Guarantee eligibility

Hybrid inverter upgrade available where needed

AC-coupled installation. No solar downtime during install.

Book a free battery survey

What is included in every installation

In-person site survey and system sizing
Battery system and hybrid inverter (if required)
Full installation and cable management
App setup and monitoring configuration
Smart tariff optimisation advice
Commissioning and handover
12-month workmanship warranty

Call 01494 977298

Which Chilterns towns do we cover for battery storage?

We cover 51 towns across the Chilterns. Click your town for local availability.

What do homeowners ask about battery storage?

Home battery storage starts from around £3,495 installed in the Chilterns. The price varies based on battery capacity, brand, and the complexity of the installation. Common home battery sizes are 5kWh to 15kWh. We give a fixed price at the site survey.

Battery storage without solar can be used with time-of-use electricity tariffs: charging from the grid at night when rates are low and discharging in the evening when rates are high. This can save money on some tariffs, but the returns are lower than with solar. We advise at the site survey based on your actual tariff and usage.

Yes. We retrofit battery storage to most existing solar PV systems. We check your inverter compatibility at the survey. Most inverters installed in the last 10 years are compatible, but some older systems may need an upgrade.

Most home batteries come with 10-year warranties and are designed to retain at least 70% of their original capacity after 10 years. Quality brands like GivEnergy, Growatt, and SolarEdge have strong track records for longevity.

The right battery size depends on your daily electricity usage, your solar system size, and when you use most electricity. For a typical 3-bed home with a 4kWp solar system, a 5 to 10kWh battery is usually the most cost-effective. We calculate this specifically for your home at the survey.

Ready to add battery storage?

Book a free site survey. We size the right battery for your home, whether you have solar already or want to start with storage first.

Get a Free Quote 01494 977298

Monday to Saturday 08:00 to 19:00. Local Chilterns team. We come to you.